A pre-existing injury or illness is significantly aggravated when an event or exposure in the
work environment results in any of the following (which otherwise would not have occurred):
- Death
- Loss of consciousness
- Days away, days restricted or job transfer
- Medical treatment

Speaker Notes:

There must be significant aggravation of a pre-existing injury or illness to establish
work-relatedness. The workplace event or exposure must aggravate a pre-existing injury or illness
enough that it results in greater consequences than what would have occurred but for that event or
exposure. This means that the pre-existing condition requires more medical treatment than otherwise
needed; more restrictions, more days away, etc.